Unitarity and normalization of string amplitudes

Jun, 1992
25 pages
Published in:
  • Nucl.Phys.B 392 (1993) 345-368
Report number:
  • SISSA-94-92-EP,
  • DSF-T-NA-92-13

Citations per year

1984199220002008201602468
Abstract: (Elsevier)
The normalization of string amplitudes is fixed at arbitrary genus by the requirement that the elastic two-particle scattering amplitude exponentiates in the Regge regime. We use this approach to determine the overall normalization of the N -string g -loop vertex in three cases: for the bosonic string; for the type II superstring in the Neveu-Schwarz sector; and for a heterotic string model in the sector containing Yang-Mills interactions. We present a regularization procedure that removes the tachyonic contribution from the bosonic string calculation.
  • string model: heterotic
  • supersymmetry: superfield
  • scattering amplitude: higher-order
  • higher-order: scattering amplitude
  • partition function
  • vertex function
  • boson: string model
  • field theory: tachyon
  • postulated particle: graviton
  • analytic properties